The 383-500-665 provides advanced diagnostics and enhanced ignition sequencing for models including the Ultra 80

As a technician knows

This specific module is rated for 208/240 VAC

How do I calibrate the T-5500-1054

Belimo 01MT-5L5 Sensor 319825-402 The 383-500-665 provides advanced diagnosticsThe Belimo 01MT 5L5 is a high precision duct averaging temperature sensor designed for accurate thermal monitoring in large scale HVAC air handling units. Featuring a 20 foot (6 meter) flexible probe, this sensor employs a passive NTC10k Precon thermistor to provide stabilizing temperature data across the entire duct cross section, effectively eliminating errors caused by thermal stratification or localized dead zones. This duct mounted sensor is